// Image Slideshow Plugin for jQuery
// http://timothyfletcher.com
// Copyright (c) © 2009 Tim Fletcher
// 
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.

jQuery.fn.slideshow = function(options) {
	
	options = $.extend({
		crossFadeTime: 1000,
		displayTime: 3000,
		descriptions: 1
	}, options);
	
  	return this.each(function(){

		var newImage = 0
		var oldImage = 0;
		var	container = this;
		var images = $('img', this);
		var totalImages = images.length;

        // Hide all images except the first one
        // We could do this in CSS (for performance) but then nothing would show if JS was disabled
        images.hide().filter(':first').show();

        // Hide all descriptions if we're not using them, else just show the first one
        if (options.descriptions) {
            $('.desc').hide().filter(':first').show();            
        } else {
            $('.desc').hide();
        };

        function imageRotate(container) {
		    
            newImage = (oldImage + 1) % totalImages;

            setTimeout(function(){
                $('img:eq('+oldImage+')', container).fadeOut(options.crossFadeTime);
                if (options.descriptions) {
                    $('img:eq('+oldImage+')', container).next().hide();                    
                };
            }, options.displayTime);

            setTimeout(function(){
                $('img:eq('+newImage+')', container).fadeIn(options.crossFadeTime);
                if (options.descriptions) {
                    $('img:eq('+newImage+')', container).next().slideDown(300);
                };
                oldImage = newImage;
                imageRotate();
            }, options.displayTime);
        }
        // Execute
        imageRotate();
    });
};